Stop mechanism for looms.



No. 824,335; I PATENTED JUNE 26, 1906.

J. W. BRIDGE. STOP MEGHANISM'POR LOOMS.

APPLICATION FILED MAY 13, 1905.

4 SHEETS-SHEET l.

No. 324,335. PATBNTED, JUNE 26, 1906.

' J. w. BRIDGE.

STOP MBGHANISM FOR LOOMS.

APPLI GATION FILED MAY13, 1905.

4 SHEETS-SHEET 2.

WITNESSES- f 04%M4 23. W

PATENTED JUNE 26, 1906.

APPLICATION FILED MAY 13, 1905.

4 SHEETS-SHEET 3 PATENTED JUNE 26, 1906.

J. w. BRII'DGE. STOP MECHANISM FOR LOOMS.

APPLICATION I ILED MAY13; 1905.

' 4 SHEETSSHEET 4.

WrrhIEESEE- M4 w 0M div/86 5 MM% ITNITED STATES PATENT OFFICE. it JOHN WESLEY BRIDGE, or METHUEN, MASSACHUSETTS, ASSIGNOR To ARLINGTON MILLS, OF LAWRENCE, MASSACHUSETTS, A CORPORA- 'TION OF MASSACHUSETTS.

STOP MECHANISM FOR Loolins.

ments in Stop Mechanism for Looms, of"

which the following isa specification. The invention relates particularly to stop mechanism for looms which is automatically melectrically controlled by an electromag'pefi .for each loom in the system, each of W magnets is in a normally closed shunt-circuit from the main conductors, and collectively they are in multiple circuit therewith.

Where automatically-operated stop mechanism'is employed in looms, the operativessoon rely upon such automatic mechanism and give little attention to defects in the weaving which are not thus indicated. Heretofore where such stop mechanism has been electrically controlled the circuits emplpiyed have been open circuits, which were close by the fall of a'metallic drop-bar when a. warpthread which supported it was broken. In

. this open-circuit arrangement there were no means for determining when the main .line

' tion of the operative.

was broken or the electric current otherwise interrupted, except in some instances where a sound or light signal 'was'employed, but this was inefiective by reason of the inattenpensive fabrics, it is very essential not only that means be provided for automatically determining when a warp-thread breaks, but also when the main current is interrupted from any cause, for if the electric current is interrupted the stop mechanism intended to be put in action by the breaking of a we thread will not operate when a dro -bar all; and in such case man yards of imperfect fabric might be woven eiore it is discovered by the loom tender, and as a consequence so much expensive material would practically go to waste. This invention w1ll obviate such a contingency; and it consists'in an electromagnet for each loom to be controlled, these ma ets being in normally closed loops or multip e circuit with the main electric con- I Specification of Letters Patent. Application filed May 18, 1906. Serialllo. 260,2 84.'

When weaving ex- Patented. June 26, 1906.

termed retaining-magnets, for the reason that normally they IGtf in the parts of the stop mechanism out of operative relation,

while if from any cause the main current is broken or interrupted all of the armatures will be released and all of the looms connected with the'system willbe stopped. Then if the cause of the interruption cannot be readily found and removed each loom c'an'be disconnected from the automatic control devices and the loom tenders made to rely upon their own attention until repairs to the main electric line can be made. The' short time 'during which all'the looms may be stop ed in this arrangement involves much less oss than the production of'a' number of yards of defective fabric.

This automatic control for loom-stop mechanism maybe em loyed with the usual warpstop motion emp oyed in looms, either those electricallyoperated or those mechanically operated;'anda further portion of this invention consists in combining the well-known 'iautom'aticwarp-stop mechanism of each loom with a' cut-out in the shunt-circuit of the retaining-magnet connected with that loom in such manner thatw'hen a warp-breaks and a drop-bar falls it will operate the cutout of the shunt-circuit, open thatcircuit, and cause the stop mechanism to stop the loo-m, and this will be done without affecting the shunt-circuit of any other loom connected with the system. As an electric cir cuit will be required for the operation of the retaining-ma ets, it will be found advantageous to emp oy the electriccurrent for operating the warp-stop mechanism, and such construction will be chiefly shown and described herein. v

In the drawings, Figurel. 1s an end elevation of a loom-frame, partiallz; broken away, showing one endof' t e brac et which supports the lease-rods, drop-bar contact-rods, a series of drop-bars hung on warp-threads, the

lathe, shipper lever and its connection with .warp-stop-motion magnets, which operate the cut-out to break the retaining-magnet circuit, and the electrical connections inthe system. Fig. 3 is a detail showing the construction by which the cut-out for the retaining-magnet may be operated by mechanical warp-stop mechanism. 4 is a diagram matic view showing the electrical connections of two loom-magnets with the main circuit.

Referring to the drawings, A is the loo1n' frame; L, the lathe S, theshipper-lever and t, an arm by which the shipper-lever is released or knocked out of its retaining-slot by the movement of the lathe when the arm t is in the osition shown in dotted lines, Fi 1.

' is a pair of electromagnets secure upon. the insulating-bracket B. The armature N of the magnets M is fulcrumed at n, and to the short erd of this armature-lever N one end of a sprin 0 is secured and the other end to the brac laet B, the tension of the spring being made suflicient to raise the long end of the armature, the rod n, and the arm t, to which it is attached, when the magnetic force of the magnets M ceases to act. Excitingcurrent is supplied to the magnets M from theggenerator ,G through the main circuitconductors g g and shunt-circuit m m.

These shunt-circuits are each provided with a cut-out C, Figs. 1 and 2, or C, Fig. 3, which cut-out is operated by the warp-stop mechanism in the loom. As illustrated in Figs. 1 and 2, electric ally-controlled warp-stop mechanism of the usual construction is employed, consisting of magnets W, which for convenience are supported by the insulating-bracket B; The armature m of the ma nets W has its fulcrum at m and is'controlle by a spring y. The lon end of the armature W carries one part of t e cut-out C, consisting of a metallic contact piece or button (I, secured thereto with an interposed insulating-block I. The other part 01 of the cut-out is secured to a stationary block. These two contact-pieces of the cut-out are in the shunt-circuit m while the magnets W are in another circuit w connected with the main conductors, which also includes the drop-bar guiderods 6 and contact-bars f, and when a dropbar h falls. the circuit w is closed by the contact of the drop with a rod e and barf, themagnets W are thereby energized, the armature in is drawn upward, the parts d d of the cut-out G are separated, the circuit m is opened, which releases the armature N, and by the operation of the spring 0 the long arm 0 the armature, with the rod n, are raised, and with them the arm t, to which the rod is connected. This places the arm t in position to be struck b the lathe L at its next forward movement, y which the shipper-lever S will be operated in the usual way and the loom stopped.

The cut-out for the circuit of the magnets M may be operated by mechanical warp-stop mechanism by connecting 'the operating-1ever of any of the usual mechanical formsfor instance, as illustrated in Fig. 3. There the cut-out C is of the knife-blade type, the

K is pivoted to a rod P, which isoperated in the usual manner of mechanical constructions by a cam Q. The action of the cam upon the rod P is controlled in the usual way by the position of the drop-bars or other detectors, which when down intercept fingers or feelers connected with rods R and cause the cam to pull the rod P back, tilt the lever K to the dotted-line position, and separate theparts of the cutout C, which opens the circuit m and causes the stop mechanism to operate through the release of the armature N of the-magnets M the same as when the cut-out is operated by the magnets W. When the drop-bar has been restored to its normal position by mending the warp-thread, the crank-lever K is returned to its normal position by a spring 11,, and the circuit m is again closed by the contact of the coacting parts of the cut-out C. v

v Any of the usual forms of drop-bars or detectors may be em loyed, the form illustrated being only one 0 many. Magnets for one loom only are shown; but it will be understood that magnets and connections of similar construction are to be applied to each loom which it is desired to control.

I claim 1. In electrically-controlled stop mechanism for looms, a shunt-circuit from the elec-' trical source, for each loom to be controlled, a magnet in each shunt-circuit, and an armature for each magnet, which is connected with and controls the operative relation of the parts of the stop mechanism of its loom.

2. In electrically-controlled stop'mechanism for looms, a series of magnets connected in multiple with the electrical source, one magnet of the series for each loom to be con trolled, and an armature for each magnet connected with and adapted to control the operative relation of one part of the stop mechanism to the other, in that loom.

3. In electrically-controlled stop mechanism for looms, a shunt-circuit from the electrical source, for each loom, a magnet in each shunt-circuit, an armature for each 'ma et which retains the parts of the stop mec anism out of operative relation, while its circuit is closed, and a cut-out in each shunt-circuit which is controlled by warp-stop mechanism in the loom.

4. In electrically-controlled stop mechanism for looms, a shunt-circuit from the electrical source, for each loom, a magnet in each shunt-circuit, an armature for each magnet which is connected with and controls an operative part of the stop mechanism, a, cutout in each of said shunt-circuits, a series of warp-supported drop-bars, a second magnet an armature for the second magnet which operates the cut-out in the shunt-circuit of the stop mechanism control-magnet of the loom.

5. In electrically-controlled stop mechanism for looms, provided with warp-supported drop-bars and main circuit-conductors, an electromagnet and armature therefor the respective poles of which magnet are connected with a contact-rod of the Warp-supported drop-bars, one directly and the other through a main electric conductor, another magnet in circuit with the main conductors, one pole connected directly with one conductor and the other pole with the other conductor through a contact carried by the armature of the magnet in the drop-bar circuit.

6. In electrically-controlled stop mechanism for looms, provided with main currentconductors and warp-supported drop-bars, a magnet normally in circuit with the main current-conductors, an armature for the magnet which retains the parts of the stop mechanism out of operative relation, while the circuit is closed, a second magnet in shuntcircuit connected directly with one contactrod of the warp-supported drop-bars and indirectly through other contact-rod, and an armature for the second magnet which carries a cut-out for the circuit of the first magnet.

7. In a stop mechanism for looms provided with main current-conductors and warp-controlled detectors, a magnet normally in closed circuit with main current-conductors, an armature for the magnet which controls the operative relation of'the parts of the stop mechanism of the loom, a second magnet one pole of which is in circuit with one contact-rod of the warp-controlled detectors, and the other pole with another contact-rod through a main conductor, a cut-out for the circuit of the first magnet, and an armature for the second magnet which carries and operates the cut-out.

JOHN WESLEY BRIDGE. Witnesses:

WM. D. HAR'rsHoRNE, JOHN J. SWEENEY.

a main conductor with an- I 

